That would be 15" rims on that truck.
Tire size is 235's. That is the stock size.
The stock (OEM) tire size for a 1998 Chevrolet Tahoe is 245/75R16.
The stock tire size is 195/75/14.
P245/75 R16 Chevy stock size
15 inch sould be the stock rims and 31 should be the norm for the tire size
Tire size is 235's. That is the stock size.
14 inch
Original tire size was 215/70/14 on a 14" rim
it is 225/60/R16
31 x 10.5
Mine came stock with 235/70 r16
my 2500 has stock 245/75/16r